A series of measurements were made on four skulls (descriptions of the measurements can be found in the Student Exploration Sheet). Which is most likely a modern human skull? A. Skull A B. Skull B C. Skull C D. Skull D HELP

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?